A 11000 Grade 3 is always good, makes sure your opponent can't attack you without rear guards. Its skill is not all that powerful, but a good one to have.
Counter Blast 3 and get a + 5000 for the remainder of the turn, but losing Twin Drive! sucks. Standing after hitting a rear guard is good. But people will just throw a 20000 guard at your face, effectively wasting your counter blast. Unless you use this ability as a rear guard, where you could hope for a Stand Trigger to wake him up again.
Its passive effect, losing 2000 if you don't have other Kagerou is almost irrelevant.
It has a combo? Aside from being big, and gets bigger, I see no uses for it. True, it may be good just for its size, but its ability is a chore to play, and playing cards like Berserk Dragon or Exile Dragon along with it just wastes your resources.
Its only good point? Getting rid of enemy guardians. Playing his counter blast basically equals to burning your opponent's hand, unless they are willing to let you pull 3 cards instead.
Its like a Lamborghini Murcielago, not elegant, not graceful, but a look at it tells you 1 thing : I have nothing but RAW power.
A dragon holding an over sized sword, which looks good on the TD version of the card, not the booster one.
As a card that is readily available in a TD, which you get 2 copies for a single RM45 TD, you can't expect to make a fortune out of it.
On the other hand, its cheap to make a deck around it thou. But thats about it. Like a Nissan or a Mitsubishi, you get performance, but you don't get class nor supremacy.
Overall : 5.25/10 - slightly above average. You don't wanna have this card unless you really like it.